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(No Model.)

D. W. PAYNE & 0.3. WILLIAMS. GOVERNOR 0R SHIFTING EOGENTRIO.

No. 294,070. Patented Feb. 26, 1884..

WYZTMM/S;

UNITED STATE PATENT ()EFIcE.

DAVID w. PAYNE AND CHARLES R. WILLIAMS, or OORNING, NEW YORK,

I ASsIeNoEs TO E. w. PAYNE & sons, E SAME PLACE.

GOVERNOR OR SHIFTING ECCENTRIC.

SPECIFICATION forming part of Letters Fatent No. 294,070, dated February26, 1884.

' Application filed July 5, 1883. (No model.)

TQaZZ whom it may concern Be it known that we, DAVID W. PAYNE andCHARLES R. WILLIAMS, citizens of the United States, residing at Corning,in the county of Steuben and State of New York, have invented certainnew and useful Improvements in Steam- Governors or Shifting Eccentrics,of which the following is a specification, reference being had thereinto the accompanying drawings.

Our invention relates to that class of steam governors in whichcentrifugal force in revolving counterbalanced weights connected bysuitablemeans with the main or valvegoverning eccentric is utilized, sothat variations in the speed of rotation of the flywheel and of theshaft upon which it is mounted automatically varies the supply of steamto the cylinder, whereby uniformity of operation in the engine issecured, and it is adapted to meet the requirements of variations in itsload or work. Heretofore said weights, one or more, have been pivotallysecured'to the wheel,so as to be capable of swinging freely as pendulousweights, and suitable connecting-links have been secured between theweight and its pivot to its supporting-arm, and to suitable means forcausing the main eccentric to be moved laterally in its relation to theshaft, so that as the weights swing outwardly by centrifugal force theeccentric,through the medium of the usual connecting-rod, partiallyshuts off the supply of steam, whereby the engine is slowed down. Inpractice such constructions are lacking in sensitiveness andserviceability by reason of the number of parts employed, the frictionexisting between them, especially between the weight-supporting arm andits pivot, and the necessity of using counterbalancingsprings of veryhigh tension on account of the excessive strain upon them when the speedof rotation is high.

The object of our invention is to overcome these objections and soconstruct a governor that, instead of using heavy springs of greattension, we may use lighter springs of lighter tension and greaterextension; and instead of overcoming the immense centrifugal forceexerted in the weight or weights and the friction and wear produced byit by a simple pivot, the bearing-surface of which is comparativelylimited, we diffuse said friction eccentric and its adjuncts; Fig. 4, anelevation of the same, and Fig. 5 a modified arrangement of theprincipal elements.

Like letters indicate like parts in all the figures.

A represents the main or crank shaft of an engine, upon which thefiy-wheel (or it may be a disk) B is rigidly mounted.

0 represents aninner or secondary eccentric and D the outer, main,primary, or valve-operating eccentric, which is connected with the valveby any usual and well-known mechanism. The inner eccentric comprises thefollowing adjuncts, which may be integral therewith, as shown, or formedseparately and secured thereto, as desireda hub, 0, adapted to fit theshaft A, so as to rotate thereon, and two diametrically or otherwiseopposite lugs, c c. The outer eccentric, D, is provided with an arm, (I,pivoted to the wheel or disk at d, and is apertured in the line ofsuspension for the reception of the inner eccentric, C, which touches itat two points, 0 0", only, and constantly, in order toinsuresmoothness-in operation. These features of construction in the outereccentric are not claimedherein, as they are embraced ina previousapplication (Serial No. 86,106) filed by us.

From the lug c a link, 6, extends to a weight, E, and from the lug 0another link, 6, extends to another weight, E. Each link is pivotallysecured to the lug and the weight, and each weight is adapted to ride orslide upon a straight guide, F, firmly seated in the rim; or it may bein any other portion of the wheel, or any disk adapted to coact with theelements as does the wheel B. The guides F project squarely within thearea of the wheel, in con tradistinction to a radial disposition ofweight- 2 QENLQIWD guides as heretofore constructed; and we deem thedisposition herein shown of the guides an essential and valuable featureof our inven tion, for reasons hereinafter stated. Brackets fmay or maynot, as desired, be employed to support the inner ends of the guides.

. To the hub O are secured two flexible bands, straps, or chains, r/theformer at on one side and passing therefrom in one direetion and thelatter at g on the opposite side and passing therefrom in the oppositedirection, and each is secured to a spring, G G, respectively, whichsprings are adj ustably connected by an eyebolt, H, to a bracket, h,secured to, or it may be formed on or in, the wheel.

In Fig. 5 we have illustrated one applicatien of our invention toasteanrgovernor comprising a single eccentric having a slot across theline of suspension, to show that advantages may be secured by modifieduses of our method of construction and arrangement of the principalelements, which uses we deem as fully comprehended by our invention. Inthis illustration the link 0 is connected to an intermediate pivotedlink or lever, J, whicli is connected to the weight E by a pin and slot,j, or it may be by a third link, which will allow the lever to pass itscenter of motion.-

In this illustration the springs act as compression springs; but, ifdesired, they may act as contractile springs, as shown in Fig. 1. Ive donot limit ourselves to the use of either character of springs, as othersprings of C, elliptical, or any other form may be adopted, if

in a line crossing the shaft, so as to vary the' throw, of the valve, asusual. \V hen the inner eccentric is rotated by an outward movement ofthe weights, as described, the flexible bands, straps, or chains arewound up 011 the hub O, the springs G G extending in proportion to theextent of rotation, and as the speed decreases the tension of thesprings overcomes the weights and draws them inwardly until thecentrifugal force and the tension of the springs are equally exertedupon the weights.

It will be seen that instead of sustaining the entire strain of theweight on a single pivot at the end of an arm supporting the weight, asheretofore, we provide a long bearing-surface arranged squarely withinthe wheel, upon which bearing the weight slides, and as the centrifugalforce, and therefore the friction and strain of the weight, is greatestwhen the speed is highest, the weight is at such times at, a strongerportion of or point on the guide. Taking a pendulous weight at its placeof rest and at the extreme point of its outward movement, and drawing aline from the rim of the wheel or disk, which passes through the centerof the weight at each of said positions, we establish what we deem thebest practical disposition of our guidethat is,- the best line in or onwhich to place the guide. Such disposition we have herein designated asprojecting squarely into the area of the wheel or disk, and intend suchdesignation to mean any line pro duced as above stated, and any linesimilarly produced in contradistinction to a purely radial or to acurved line. in straight lines other than radial.

Although we have described and illustrated our weights and guides ascontained wholly within the area of the wheel, we wish to be understoodas not limiting ourselves in this respect, as the weights and guides mayextend beyond the rims of the wheel or disk nor do we confine ourselvesto the use of two ecceir tries, as it is apparent that the outereccentric may be removed and the remaining elements employed foroperating a riding cut-ofl valve.

Instead of the rigid links 0 c, we may use flexible straps, bands, orchains, as indicated by dotted line 0 Fig. 1, in which case the lugs c 0would be adapted to support the flexible connection, if desired, ontheir peripheries, as or similar to the arrangement of the bands orchains 9 g.

Having described our invention, what claim is- 1. In a steanrgovernor, aweight or weights adapted to be influenced by centrifugal force,

, and a guide or guides for the same arranged squarely within the areaof the governor or its described equivalent area, substantially asspecified.

2. In a steam-governor, a shifting eccentric connected with and operatedby a weight or weights mounted upon straight guides arranged sqnarelywithin the area of the wheel or disk, substantially as specified.

8. The combination of a suspended shifting eccentric, a weight orweights arranged to slide upon a straight guide or guides arranged in oron other than radial lines, connecting links, bands, or chains, and acounterbalancing spring or springs, substantially as specified.

4. The combination of a shifting outer eccentric, an inner eccentric,and links secured to the latter and to weights adapted to slide uponstraight guides arranged on other than radial lines, substantially asspecified.

5. In a steam governor, the combination of an eccentric, acounterbalaneing-spring, and a flexible connecting band or strap,substantially as specified.

6. In a steam-governor, the combination of an inner eccentric, and anouter eccentric operated thereby by means of centrifugal weights, withcounterbalancing-springs connected to said inner eccentric by flexiblemeans, sub stantially as specified.

XVe dispose our guides IOC 8. The combination of the eccentricsO D,springs G G, links 6 e, weights E E, straight guides F, wheel B, andshaft A, substantially as shown and described. IO 9. The combination ofthe suspended outer eccentric, D, inner eccentric, 0, having hub C andlugs c c, the bands, straps, or chains g g,

springs G G, bolts H, brackets h, links 6 e,

weights E E, guides E, wheel B, and shaft A,

substantially as shown and described. I

In testimony whereof we affix oursignatures in presence of twowitnesses.

DAVID W. PAYNE.

' CHARLES R. WILLIAMS.

\Vitnesses:

E. O. POND, GEO. S. MARX.

